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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-06-01 09:23:40 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-06-01 09:47:48 +0100 |
| commit | 3842ba494963b1d76ad5f68b8d1e5c2279160e31 (patch) | |
| tree | 3e324044d4625eb20678d950cb655d78c722e365 | |
| parent | a55e2da2702e235fa0ae66a116d304d1bffc060a (diff) | |
| download | glibc-3842ba494963b1d76ad5f68b8d1e5c2279160e31.zip glibc-3842ba494963b1d76ad5f68b8d1e5c2279160e31.tar.gz glibc-3842ba494963b1d76ad5f68b8d1e5c2279160e31.tar.bz2 | |
aarch64: align stack in clone [BZ #27939]
The AArch64 PCS requires 16 byte aligned stack. Previously if the
caller passed an unaligned stack to clone then the child crashed.
Fixes bug 27939.
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/clone.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/clone.S b/sysdeps/unix/sysv/linux/aarch64/clone.S index c9e63ba..fe04bce 100644 --- a/sysdeps/unix/sysv/linux/aarch64/clone.S +++ b/sysdeps/unix/sysv/linux/aarch64/clone.S @@ -47,6 +47,8 @@ ENTRY(__clone) /* Sanity check args. */ mov x0, #-EINVAL cbz x10, .Lsyscall_error + /* Align sp. */ + and x1, x1, -16 cbz x1, .Lsyscall_error /* Do the system call. */ |